Looks like a sporterized (modified for sporting/hunting) Savage (US Made) No.4 Mk1*. These were made under lend lease for the British by the Americans during the war.
Yours looks like the barrel has been modified by shortening the barrel and adding a different sight. your also obviously missing the fore stock.
As for value, I would pay maybe $80-100 for it since the barrel was nipped and its missing the fore stock.